Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AIIMS 2014
Exam
AIIMS
Year
2014
Subject
Physics
Chapter
Work, Power and Energy

AIIMS 2014 · Physics · Work, Power and Energy

A body of mass 2 ~kg is thrown up vertically with kinetic energy of...

A body of mass 2 kg2 \mathrm{~kg} is thrown up vertically with kinetic energy of 490 J490 \mathrm{~J}. The height at which the kinetic energy of the body becomes half of its original value is

Options

  1. A50 m50 \mathrm{~m}
  2. B12.25 m12.25 \mathrm{~m}
  3. C25 m25 \mathrm{~m}
  4. D10 m10 \mathrm{~m}

Correct answer

B. 12.25 m12.25 \mathrm{~m}

Step-by-step solution

Potential energy at the required height =4902=245 J=\frac{490}{2}=245 \mathrm{~J} Again, 245=2×10×h245=2 \times 10 \times h or h=24520 m=12.25 mh=\frac{245}{20} \mathrm{~m}=12.25 \mathrm{~m}
Practice Work, Power and Energy on Quantrex Academy →

More from Work, Power and Energy

All Work, Power and Energy questions Full Work, Power and Energy list All AIIMS PYQs